these journals contain stunning imagesof the construction of the titanic and it's near identical twin the olympic ifound these journals at the university of illinois library journals writtenbetween 1909 and 1911 take me back to a time before the titanic sunk they giveme a new perspective and let me appreciate the enormity of the scale ofthe engineering of the olympic class ships so let me share with you somefascinating details about the titanic and it's twins the olympic and botanicthe story starts here in the harland and wolff shipyard in belfast ireland thislarge framework called a gantry surrounds the ships as they are built itsupports the overhead cranes in the
scaffolding used by workers as theyconstruct the olympic in the day tannic notice that just beyond the far into thegantry lines the belfast harbour workers will build the olympic here on the rightand then nine months later before the olympic is finished they will start onthe left the titanic when completed the olympics turner rear into the ship willpoint toward the harbour the ship's construction starts with the turkey hillseen here as a long dark shape the keel is the backbone of the shipping givesthe ship rigidity if we look at the key or from the land side we see the killblocks that supported these wooden blocks typically pounds separate theship from the slip concrete floor of the
gantry each kill black stands about fivefeet high so this creates a space under the shipfor workers to construct the ship workers build the ship outward from akiohere they construct the olympics double bottom in pink we see the framework thatseparates and supports the two bottoms of the ship the second bottom is shownin orange it's made of steel plates and is sometimes called the tank top becausethe double bottom contains 44 watertight tanks most of the tense korean sea waterused as ballast to balance and add weight to the ship but some carryingfresh water in total the double bottom carried over 5,000 tons of water orabout 1.5 million gallons once they
finish the double bottom workers whowrecked the framing for the whole from this you we see the framing for thestern of the ship it would work with sees dead in the tank top from the floor andlooking to the after the ship harbour is looking closer we see the room likestructure of the start of the transfers frame of the ship workers rivet to thisframe the hall which will form the skin so far we've watched the olympicsconstruction in the gantry that ship sits here in the background in theforeground likes the keel of its twin the titanic its construction began ninemonths after the olympic we see here
attached to the kill the framework ofthe titanic's double bottom notice this large claw like mechanism lying on theground and these three hundred cranes these are hydraulic rivers which workersused to install most of the three million rivets on the titanic humorouslythe almost complete halls of both the olympic and titanic work inside theolympic progresses rapidly staterooms are being erected and plumbing is beingfitted throughout the ship to prepare for the olympics launch workers paintthe ship a light grey zone will stand out in black and white photographsalthough they repainted the ship black soon after its launch the domesticprevious white star liners to ease the
slide into the water to slip was creasedwith 23 tons of tallow oil and so in order to release the ship was given thehydraulic trigger is released and the ship slid into the harbor reaching aspeed of twelve and a half knots notice that the ship has launched backwards formany reasons for this but among them is at the stern the rear is wider than thebow so it is more buoyant in a mere 62 seconds after launch the olympic was afloat the moment the ship hit the water is its official launch date although itwas mostly empty here it weighs only about 27,000 tonnes and so rides high onthe water the draft the vertical distance betweenthe bottom of the ship on the surface of
the water is only 18 feet after thiscompletely fitted it will weigh nearly twice that 52,000 tonnes with that additionalweight the olympic will drop into the water reaches the border painted on thewhole draft of about 34 feet olympic cannot move by itself so a tugboat goes into the shooting out key where agigantic crane loads the ship you the crane lifts aboard a cylindrical boilerthe final city including attaching the propellers is done in dry dock and thenonce everything is in place the olympic is ready for the sea
seven months after this launch thetitanic was launched i hear from this journal a few photos of the event butkeep in mind the olympic get the big press because it was first that it onlybecomes more interest in retrospect this photograph shows the twins the olympicand titanic although built side-by-side this was the last time they werephotographed together less than a year after the launch of these two jet chipsone suffered a collision that ripped a gaping hole in its side that ship was ofcourse the olympic in september of nineteen eleven the olympic departed theport of southampton england sailing toward the isle of wight olympic turnedinto the stolen straight and passed to
british warship the hms hawk the hotscommander was surprised by the olympics wide turn but he managed to take a safeposition behind and to the right of the olympic hockey then increased speed topass the olympic but the olympics weeks suck the hawk inward rapidly the hawktore a large hole in the olympic and below its water line the damage was evengreater about the hawk was completely smashed in the olympic limp back tosouthampton with the holes were temporarily past with wood beforereturning to its home dock in belfast for repairs the olympic sibling also suffered atraumatic blow the cost to tragically
sick i'm of course talking about therhetoric the britannic was the same size in very similar to the olympic andtitanic although intended to be a passenger liner the ship was draftedinto military service in world war one as a hospital ship well in themediterranean it hit a minor was struck by a torpedo and sank in less than anhour despite these accidents the olympic class ships were great feats of designand workmanship just consider the proposed system of the titanic the shiphad two sets of reciprocating engines these engines were fueled by coal which was stored along the bottom of theship exhaust gases from the boiler
discharged through these smokestackswhich are frequently called the finals now they don't look like rolls and tellyou look at them the right way there upside-down troubles this cross-sectionof the olympic shows the boy they're sitting atop the double bottom exhaustfrom the boilers is funneled up out of the ship it's well known that the mostfun on the ships is it dummy was built primarily for aesthetic reasons althoughit did not serve as the boilers it was used as the ventilation and extractionchef for the engine in turbine rooms at a tanning nude 4,000 tons of coal for atransatlantic trip which took 24 hours to shovel into the bunkers here in thisphoto of the sas minnehaha kohl is being
loaded into coal ports on the side ofthe whole loading coal into the total acquired much the same way this loadingleft streaks of called us down the hall and so nearly all ocean liners have thetime or painted black to help hide these traces of call after the advent ofoilfield ships lighter colors became more popular as the titanic crossed theatlantic six hundred and fifty tons of coal per day was shuttled intocylindrical boilers it was burned to produce steam these boilers were nearlysixteen feet in diameter this picture shows a single boiler notice the twoworkers decided this team was paid to these reciprocating engines the engineswhen viewed from the front of the ship
look like this the oranges the piston rod and insidethe cylindrical casing is the piston this worker peering out of this casingis a since the engine size excess steam from these engines was used to drive aturbine engine this shows the turbine under construction and without its outercasing note the workers of the top this is huge if you look closely you can seethat the turbine is made of hundreds of the individual blades shaft transferspower from the engines to the propellers the ones on the left and the right werepowered by the reciprocating engines in each propeller weighed thirty eight tonswhile the central bell
was powered by the turbine engine he wascast as a single piece of manganese bronze and we 22 tons the outerpropellers reused retired navigation of harper's will the central pillar wasused only in open seas also unlike the others the central propeller could notbe driven in reverse only forward even with this powerfulproposing system the olympic class ships were not the fastest at the time whichwas intentional the white star line decided to focus on comfort and luxuryover speed it's clear that the lavishly decorated rooms on the olympic andtitanic certainly made the passage more enjoyable but there was some hiddendesigned choices that made these ships
the pinnacle of comfort for all classesof service the ships were steered using these helical gears each ship had twosets of both the spur gears and the bevel gears these massive gears arenearly six feet across made of solid steel and each waythousands of pounds noticed the herringbone pattern in the teeth thispattern allowed a tight engagement the teeth and resulted in reduced vibrationtransmitted to the rest of the ship altogether the gearing on the titanicweighed about seven and a half tons this very large structural pieces called theboss arms knees arms held the shaft of the outer propellers in place because oftheir size and strength they reinforce
the whole which reduces paintingpainting occurs when variations in water pressure say the question versus thetrough to the waves flicks the whole inward and outward less flexing resultsin less vibration fell by the passengers these boss arms also called shelfbrackets were fitted twenty feet apart at the very after the ship while thetitanic and britannic both had tragically short careers the olympictriumphed in its lifetime it made over 500 trans-atlantic journeys carryingover 400,000 passengers and ceiling one and a half million miles it even spentfour years as a us-canadian troop transport during world war one earningthe nickname old
liable after 24 years of service theship was decommissioned and scrap for parts the olympic class ships were absolutelymarvels of engineering i hope it's rather revolutionary design rather thantheir failures are remembered i'm gonna hammock engineer guy i think my advancedviewers for their useful feedback on a draft of this video if you like to signup at engineer guy dot com slash support
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